Single button function

[Melanie]

AMPMFlag=AMPMFlag^1 '>>>>>>>>>>>>>>>>>>>what does this do?

AMPMFlag is a BIT variable.
All this does is toggle the BIT variable, if it was zero it will be set to 1, if it was 1 it will be set to 0. It is the equivallent of...

IF AMPMFlag=0 then
AMPMFlag=1
else
AMPMFlag=0
endif



Lc var byte [15]
For i = 0 to 15 : read i, b0:if b0 = 0 then
lookup i,[1,2,3,11,4,5,6,11,7,8,9,10,11,12,13,14], b0
Lc(i)=b0 '>>>>>>>>>>>>>>>>>>>>>>>>>>>what does this do?

Lc is a BYTE array 15 elements deep in the range Lc(0) to Lc(14)
You are loading Lc at array location i with the contents of variable b0

[leisryan]

Thank you Mel,
I am incorporating your olympic timer in my medicine scheduler project I used some code snippets from les Johnson's book "experimenting with picbasic" I also read your thread with bits,byte, and arrray handling and found it intuitive!!!
I am still fixing my keypad routine to scan and output to LCD like a mobile fone does(",) I am trying to find a lcd menu routine for my display I will post it later on a new thread

thanks again
ryan

[bbarney]

here is a chip that will give you 2 button's on one i/o
http://www.maxim-ic.com/quick_view2.cfm/qv_pk/4588

[Melanie]

You seriously want to pay $1 for a 2 I/O expander?

If you need two buttons on one I/O, then you can achieve that with a different value of Capacitor on each of two Buttons and measure the time period for charge. Cost about 5 cents and a bit of magic in software...

[DynamoBen]

You could also use the pot command and tie each button to a different value resistor.

This gives you the added ability of determining when both buttons are being pressed.

[bbarney]

Well if I had been trying to solve this problem since March I think a $1 part would be cheap,sorry you didn't like my feable attempt at helping out
I'll go to my room now and keep quiet.

[Melanie]

Don't get the hump over my comment... I'm NOT criticising your contribution which is perfectly valid, but think about a $1....

For $1 you can get a PIC with a heap of I/O's...

For an extra $1 added to whatever PIC you are currently using would probably give you a dozen I/O's more

For 75 cents you can get an I2C 8 channel I/O expander...

For 45 cents you can get a PIC10F to give you your extra I/O's...

Adding I/O's at the rate of 50 cents per I/O is nonsensical... there's just so many options available for less money - but...

you've brought it to everyone's attention, and that just might be exactly the product someone is looking for, so thank you for that.